Results 211 to 220 of about 54,691 (254)

A Novel Pilot Assignment Approach for Pilot Decontaminating in Massive MIMO Systems

2017 IEEE Wireless Communications and Networking Conference (WCNC), 2017
This paper proposes a novel joint pilot assignment (JPA) approach aiming to eliminate pilot contamination in massive multiple-input multiple- output (MIMO) systems. The JPA approach jointly assigns pilots in both the time domain and spatial domain. With JPA, the multi-cell cellular massive MIMO network is divided into four cell groups.
Pengbiao Wang, Chenglin Zhao, Yongjun Zhang 0008, Yang Zhang, Gordon L. Stüber   +4 more
openaire   +1 more source

Pilot decontamination in massive MIMO systems: Exploiting channel sparsity with pilot assignment

2014 IEEE Global Conference on Signal and Information Processing (GlobalSIP), 2014
This paper deals with the pilot contamination problem for massive MIMO systems. Considering the sparse nature of channel impulse response inherent in wideband systems, the paths of channels of the desired and interference users hardly arrive at the same time, which allows most paths of desired channel to be distinguishable from the paths of ...
Zhilin Chen, Chenyang Yang 0001
openaire   +1 more source

Joint pilot assignment and pilot contamination precoding design for massive MIMO systems

2017 26th Wireless and Optical Communication Conference (WOCC), 2017
This paper investigates the joint design of pilot assignment and pilot contamination precoding (PCP) to combat pilot contamination in multi-cell multi-user massive MIMO systems. The system performance of the downlink transmission in massive MIMO with PCP is investigated and an optimization problem is formulated to find the best pilot assignment ...
Mei Zhao, Haixia Zhang 0001, Shuaishuai Guo, Dongfeng Yuan   +3 more
openaire   +1 more source

Dynamic Pilot Assignment in Massive MIMO Systems with Time-Shifted Pilot

2018
The time-shifted pilot with downlink data overlap considering an infinite number of antennas in base station can mitigate pilot contamination well, but there is still interference between the cells in the same group. Different from the conventional random pilot assignment method, this paper proposes a dynamic pilot assignment method based on the ...
Shuangshuang Jiang, Bin Wang
openaire   +1 more source

Pilot hopping in multi-cell massive MIMO systems: Pilot assignment and new results

2017 International Conference on Computing, Networking and Communications (ICNC), 2017
Massive MIMO promises large spectral and power efficiency. However, pilot contamination, a well known challenge in massive MIMO, limits these aspired gains. In this paper, we propose a pilot hopping sequence along with a pilot reuse strategy for pilot decontamination.
Ahmed S. Alwakeel, Ahmed Hesham Mehana, Atif Ghoneim   +2 more
openaire   +1 more source

A Smart Pilot Assignment in Multi-Cell Massive MIMO Systems Using Virtual Modeling of Assigning Cost

IEEE Transactions on Signal Processing, 2021
In this paper, a smart pilot sequence assignment method is proposed to minimize inter-cell interference generated in a massive multi-input multi-output (MIMO) system due to pilot contamination in uplink TDD (Time Division Duplex) mode. The proposed method employs a zero-one integer linear programming method as the assignment algorithm.
Reza Ebrahimi, Hossein Zamiri-Jafarian, Morteza Khademi   +2 more
openaire   +1 more source

A Pilot Scheme in Controlled Laboratory Assignments

International Journal of Electrical Engineering & Education, 1977
A procedure is described which enables students to control their own laboratory work. An environment is thereby created which encourages the students to display initiative and take responsibility for their own work. A questionnaire illustrating student reaction and an example of a typical case study are included.
openaire   +1 more source

Pilot Assignment vs Soft Pilot Reuse to Surpass the Pilot Contamination Problem: A Comparative Study in the Uplink Phase

2020
Even though, Massive MIMO (M-MIMO) technology offers good improvement in terms of performance and quality of communications between users and Base Stations (BS). This technology, still limited by a harmful constraint renowned Pilot Contamination (PC) problem.
Abdelfettah Belhabib, Mohamed Boulouird, Moha M'Rabet Hassani   +2 more
openaire   +1 more source

Pilot Assignment and Channel Estimation via Deep Neural Network

2018 24th Asia-Pacific Conference on Communications (APCC), 2018
In orthogonal frequency division multiplexing (OFDM) systems, channel estimation is by far the most important operation in the receiver to ensure the accurate detection and decoding. Over the years, pilot-aided channel estimation has been widely used for this purpose.
Seunghwan Lee, Hyungyu Ju, Byonghyo Shim
openaire   +1 more source

Teacher-Child Interaction Training: A Pilot Study With Random Assignment

Behavior Therapy, 2015
Teacher-Child Interaction Training (TCIT), adapted from Parent-Child Interaction Therapy (PCIT), is a classroom-based program designed to provide teachers with behavior management skills that foster positive teacher-student relationships and to improve student behavior by creating a more constructive classroom environment.
Melanie A. Fernandez, Jonathan S. Adelstein, Samantha P. Miller, Margaret J. Areizaga, Dylann C. Gold, Amanda L. Sanchez, Sara A. Rothschild, Emily Hirsch, Omar G. Gudiño   +8 more
openaire   +2 more sources